How to calculate a boy or a girl?

Fortune-telling explanation: you can verify it, whether it is accurate or not, remember to tell me! 49+ month of pregnancy (lunar calendar)-actual age at birth+19 If it is odd, it is a boy; if it is even, it is the month when the girl is pregnant and one year old when giving birth.

Scientific explanation: having boys and girls is random. Every cell in the human body has two kinds of chromosomes, one is called X chromosome and the other is called Y chromosome. Male chromosomes consist of 1 X and 1 Y chromosomes, while female chromosomes consist of two x chromosomes. A mature egg and sperm containing X combine to give birth to a girl. Combine with sperm containing y and give birth to a boy.